package net.xiduth.io.io.File;

/*
 * Copyright 1998-2008 Sun Microsystems, Inc.  All Rights Reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 */

/* @test
 @bug 4091757 6652379
 @summary Basic test for setLastModified method
 */

import java.io.File;
import java.io.FileOutputStream;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;

public class SetLastModified {

	private static void ck(File f, long nt, long rt) throws Exception {
		if (rt == nt)
			return;
		if ((rt / 10 == nt / 10) || (rt / 100 == nt / 100)
				|| (rt / 1000 == nt / 1000) || (rt / 10000 == (nt / 10000))) {
			System.err.println(f + ": Time set to " + nt
					+ ", rounded down by filesystem to " + rt);
			return;
		}
		if ((rt / 10 == (nt + 5) / 10) || (rt / 100 == (nt + 50) / 100)
				|| (rt / 1000 == (nt + 500) / 1000)
				|| (rt / 10000 == ((nt + 5000) / 10000))) {
			System.err.println(f + ": Time set to " + nt
					+ ", rounded up by filesystem to " + rt);
			return;
		}
		throw new Exception(f + ": Time set to " + nt + ", then read as " + rt);
	}

	public static void main(String[] args) throws Exception {
		File d = new File(System.getProperty("test.dir", "."));
		File d2 = new File(d, "x.SetLastModified.dir");
		File f = new File(d2, "x.SetLastModified");
		long ot, t;

		/* New time: One week ago */
		long nt = System.currentTimeMillis() - 1000 * 60 * 60 * 24 * 7;

		if (f.exists())
			f.delete();
		if (d2.exists())
			d2.delete();
		if (!d2.mkdir()) {
			throw new Exception("Can't create test directory " + d2);
		}

		boolean threw = false;
		try {
			d2.setLastModified(-nt);
		} catch (IllegalArgumentException x) {
			threw = true;
		}
		if (!threw)
			throw new Exception(
					"setLastModified succeeded with a negative time");

		ot = d2.lastModified();
		if (ot != 0) {
			if (d2.setLastModified(nt)) {
				ck(d2, nt, d2.lastModified());
				d2.setLastModified(ot);
			} else {
				System.err.println("Warning: setLastModified on directories "
						+ "not supported");
			}
		}

		if (f.exists()) {
			if (!f.delete())
				throw new Exception("Can't delete test file " + f);
		}
		if (f.setLastModified(nt))
			throw new Exception("Succeeded on non-existent file: " + f);

		// set/check last modified on files of size 1, 1GB+1, 2GB+1, ..
		// On Windows we only test with a tiny file as that platform doesn't
		// support sparse files by default and so the test takes too long.
		final long G = 1024L * 1024L * 1024L;
		final long MAX_POSITION = System.getProperty("os.name").startsWith(
				"Windows") ? 0L : 3L * G;
		long pos = 0L;
		while (pos <= MAX_POSITION) {
			FileChannel fc = new FileOutputStream(f).getChannel();
			fc.position(pos).write(ByteBuffer.wrap("x".getBytes()));
			fc.close();
			ot = f.lastModified();
			System.out.format("check with file size: %d\n", f.length());
			if (!f.setLastModified(nt))
				throw new Exception("setLastModified failed on file: " + f);
			ck(f, nt, f.lastModified());
			pos += G;
		}

		if (!f.delete())
			throw new Exception("Can't delete test file " + f);
		if (!d2.delete())
			throw new Exception("Can't delete test directory " + d2);
	}

}
